#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
#include <vector>

using namespace std;

class Solution
{
public:
    int uniquePathsWithObstacles(vector<vector<int>>& num)
    {
        int row = num.size();
        int col = num[0].size();
        vector<vector<int>> dp(row + 1, vector<int>(col + 1));
        dp[1][0] = 1;
        for (int i = 1; i <= row; i++)
            for (int j = 1; j <= col; j++)
            {
                if (num[i - 1][j - 1] == 1) dp[i][j] = 0;
                else dp[i][j] = dp[i - 1][j] + dp[i][j - 1];
            }
        return dp[row][col];
    }
};